ASoC: msm: Add channel map control for multi channel pcm driver

In the usecase of multi channel playback, channel map varies from
one compressed format to another. Add channel map control to set
the desired channel map for multi channel playback

Change-Id: Ib3c190e22e08d6d4cf9032a367569b5771c04025
Signed-off-by: Subhash Chandra Bose Naripeddy <snariped@codeaurora.org>